Method for the preparation of carbonated hydroxyapatite composit

Details Method for the preparation of carbonated hydroxyapatite composit Method for the preparation of carbonated hydroxyapatite composit

1994-05-18

1995-11-28

Langel, Wayne

Compositions: ceramic

Ceramic compositions

423308, 423311, C04B 3500

Patent

active

054708036

ABSTRACT:
A method for the preparation of a carbonated hydroxyapatite composition which has a density of at least 95% of the theoretical density, which method comprises sintering at substantially atmosphere pressure a green carbonated hydroxyapatite composition containing up to 20% by weight of CO.sub.3.sup.2- ions and having a green density of from 25 to 60% of the theoretical density at a temperature in the range of from 750.degree. to 1450.degree. C. in carbon dioxide containing from 0.001 to 0.10 grams of water per liter of gas, the sintering temperature being selected within the above range and the green composition being sintered for a period of time sufficient to cause the green composition to densify to at least 95% of the theoretical density.

REFERENCES:
patent: 4503157 (1985-03-01), Hatahira
patent: 4917702 (1990-04-01), Scheicher et al.
patent: 4919751 (1990-04-01), Sumita et al.
Ellies, L. G.; Nelson, D. G. A.; Featherstone, J. D. B., "Crystallographic Structure and Surface Morphology of Sintered Carbonated Apatites," Journal of Biomedical Materials Research, vol. 22, (Jun. 6, 1988), pp. 541-553.
Nelson et al. "Preparation, Analysis, and Characterization of Carbonated Apatites," Calcified Tissue International (1982) 34:S69-S81, (no month available).
Nordstrom et al. "Carbonate-Doped Hydroxyapatite," Journal of Materials Science: Materials in Medicine 1 (1990), pp. 182-184, (no month available).

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